Balancer

Here is the balancer I designed and fabricated. It consists of a piece that fits very precisely into the fan's mounting hole and a rod on which it is mounted. The rod has a pair of flats machined on the bottom end so it can be held in a vise. I first tried using a ball bearing between the two parts, but that didn't work well, as it had too much friction. Even with some light oil on the ball, it wasn't sensitive enough.

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